When I was child I was very interested in history of ancient town in Biskupin (Poland), which in 600's BC was surrouned by earth-wooden wall. One day when I was reading magazine with photos of modern reconstruction of Biskupin, I got very astonished seeing entrance gate - there was only short section of wall surrounding huts and streets (they didn't want to rebuilt entire wall), and I thought there had been really only one piece of wall in ancient Biskupin. How could they, I thought, defend themselves with over 90% percents of border not protected?
A childhood belief about history

others believed things like this
- I had a little hole in the wall under my bed when I was little and I thought that Fraggles lived in there.....— Tina
- When a soldiers went AWOL in the movies, I thought they physically climbed over "A Wall".— D Rumsfeld
- I used to believe that at the end of the universe was a big plywood wall.— matt
- I used to believe that the cool aid man was evil and he'd break through my wall and get me.— tammy
- I use to believe that my grandpa invented the wall because his name was WallyAnon
- I used to think that Hadrian also built the Great Wall of China.— Spacey